Technical data

150 ServerIron ADX Administration Guide
53-1002434-01
Using the user-based security mode
4
Defining the engine ID
A default engine ID is generated during system start up.The format of the default engine ID is
derived from RFC 2571 (Architecture for SNMP frameworks) within the MIB description for object
SnmpEngineID.
To determine what the default engine ID of the device is, enter the show snmp engineid command
and find the following line.
Local SNMP Engine ID: 800007c70300e05290ab60
See the section“Displaying the engine ID” on page 153 for details.
The default engine ID guarantees the uniqueness of the engine ID for SNMP version 3. If you want
to change the default engine ID, enter a command such as the following:
ServerIronADX(config)# snmp-server engineid local 800007c70300e05290ab60
Syntax: [no] snmp-server engineid local <hex-string>
The local parameter indicates that engine ID to be entered is the ID of this device, representing an
SNMP management entity.
NOTE
Since the current implementation of SNMP version 3 does not support Notification, remote engine
IDs cannot be configured at this time.
The <hex-string> variable consists of 11 octets, entered as hexadecimal values. Each octet has
two hexadecimal characters. The engine ID should contain an even number of hexadecimal
characters.
The default engine ID has a maximum of 11 octets:
• Octets 1 through 4 represent the agent's SNMP management private enterprise number as
assigned by the Internet Assigned Numbers Authority (IANA). The most significant bit of Octet 1
is "1". For example, “000007c7” is the ID for Brocade in hexadecimal. With Octet 1 always
equal to "1", the first four octets in the default engine ID is always “800007c7” (which is 1991
in decimal).
• Octet 5 is always 03 in hexadecimal and indicates that the next set of values represent a MAC
address.
• Octets 6 through 11 form the MAC address of the lowest port in the management module.
NOTE
Engine ID must be a unique number among the various SNMP engines in the management domain.
Using the default engine ID ensures the uniqueness of the numbers.
Defining an SNMP group
SNMP groups map SNMP users to SNMP views. For each SNMP group, you can configure a read
view, a write view, or both. Users who are mapped to a group will use its views for access control.
To configure an SNMP user group, enter a command such as the following:
ServerIronADX(config)# snmp-server group admin v3 auth read all write all
Syntax: [no] snmp-server group <groupname>
v1 | v2c | v3